公开(公告)号：US20210189037A1

公开(公告)日：2021-06-24

申请号：US16326597

申请日：2016-12-09

Applicant: SICHUAN INDIGO TECHNOLOGY CO., LTD.

Inventor： Zhonglai PAN ,  Xiaozheng ZHANG ,  Chuan LYU ,  Hongchang DU

IPC: C08F220/48 ,  C09J133/20 ,  C09D133/20 ,  H01M10/0525 ,  H01M4/62 ,  H01M50/449 ,  H01M50/42

Abstract: An acrylonitrile copolymer binder and application thereof in lithium ion battery. The technical problem to be solved is to provide an acrylonitrile copolymer binder including the following structural units in percentage by weight: 78-95% of acrylonitrile unit, 1-10% of acrylic ester unit and 2-15% of acrylamide unit. For the binder, acrylonitrile monomer is taken as the main body, and acrylic ester monomer, acrylamide monomer or acrylate monomer with strong polarity is added to acrylonitrile for copolymerization to enable the flexibility of a polymer membrane, the affinity of an electrolyte and the proper swelling degree in the electrolyte while keeping strong adhesion or intermolecular force of acrylonitrile polymer molecules, so as to fit the periodic volume changes of electrode active materials along with lithium ion intercalation/deintercalation in charging and discharging processes, thereby improving the energy density and cycle performance of the lithium ion battery.